Landscape material problem

Hello guys, I have the Problem, that some tiles of my landscape are darker than the other ones and I have no idea why.

I’m using the landscape the landscape auto material (Landscape Auto Material in Environments - UE Marketplace).

Any ideas how to fix it?

Thank you in advance!

Could you post a picture of the problem you are having? It will be easier for people to help you if they can see the problem.

Isn’t there a picture attached? You can see that there are some very strange transitions between the same landscape material layer. Even if i change the material layer, its for every layer the same.